44s 



the outer. The space between the two lines paler than the base-of the wing. 

 Outer line acutely angled in the last submedian interspace, curved outward 

 before reaching the costa, on which there is a diffused dark spot. Beyond 

 fliis line, the wing is brown, paler toward the apex: a faint, submarginal, 

 whitish line. Fringe brown, with dark, slighl lunules in the scallops ; a small, 

 black, discal dot. Hind wings with numerous, transverse, linear strigse; some- 

 times, especially toward the base of the wings, united and forming short lines. 

 Two lines: the inner a diffuse hand, inclosing and effacing (he discal dot; 

 outer line more distinct, slightly bent on the subcostal space. A broad brown- 

 ish band beyond, reaching to the apex, and leaving the margin id' the wing 

 behind the two apical teeth pale. Hind, wings deeply scalloped ; the teeth 

 large and acute. Fringe dark on the two apical scallops, pale posteriorly. 

 Beneath, both wings paler than above, and uniformly transversely strigated ; 

 the outer line common to both wings more deeply scalloped than above; on 

 the fore wings it is bent at right angles below the costa, ending in a dark 

 costal spot. Costa with transverse unequal spots. Discal dots quite large 

 and distinct. Abdomen brownish, with two rows of dorsal spots. The female 

 is rather larger and decidedly paler than the male, with deeper scallops, and 

 wanting the broad, marginal, brown band on both wings, while the fringe is 

 pale. Beneath, the wings are not paler than above 



Length of body, J, 0.80; of fore wing, <4 , 0.90, ?, 1,05: expanse of 

 wings, 2.10 inches. 



Montreal, Canada (Lyman); Andover, Mass. (Sanborn) ; Brookline, Mass., 

 July 16, 22 (Shurtleff); Easton, Pa., and Illinois (Clemens). 



This common form may be readily identified by the deeply- scalloped 

 dentate wings, the brown margins, and the slightly-scalloped, straight, outer 

 line of the fore wings, the straight outer line of the hind wings, and by its large 

 size. In the Illinois specimen, the margin of the wings is much paler than 

 usual, almost white, with a submarginal brown shade. 



STENOTKACHELYS Guende. Plate 5, fig. 7. 



Slenotrachelys Guen., Phal., i, 290, 1857. 



Walk., Lisl Lep. Het. Br. Mas., xxi. I.>, I860. 



9. — Head broader and more convex in front than usual. Palpi stout, 

 thick, porrect, or very slightly ascending. Fore wings long and moderately 

 broad; costa straight ; apex subfalcate, subrectangular. Outer edge not very 



